Table 2.
Factor loadings of Color Trail Test (CTT) scores for the entire sample, schizophrenia patients and healthy controls.
| Measure | Component | |||
|---|---|---|---|---|
| Factor 1 | Factor 2 | Factor 3 | Factor 4 | |
| Entire sample | ||||
| CTT 2 time | 0.865 | |||
| CTT 1 time | 0.828 | |||
| CTT 2 prompts | 0.813 | |||
| 2-1 difference | 0.681 | 0.671 | ||
| CTT 1 prompts | 0.660 | |||
| 2/1 ratio | 0.995 | |||
| (2-1)/1 proportion | 0.995 | |||
| CTT 1 near-misses | 0.838 | |||
| CTT 2 near-misses | 0.772 | |||
| CTT 2 color sequence errors | 0.706 | |||
| CTT 2 number sequence errors | 0.597 | |||
| CTT 1 number sequence errors | 0.443 | -0.475 | ||
| Variance (%) explained by each factor | 25.60% | 22.15% | 12.95% | 11.69% |
| Cumulative explained variance % | 25.60% | 47.75% | 60.70% | 72.39% |
| Schizophrenia patients | ||||
| CTT 2 time | 0.938 | |||
| CTT 1 time | 0.852 | -0.407 | ||
| 2-1 difference | 0.765 | 0.607 | ||
| CTT 2 prompts | 0.751 | |||
| (2-1)/1 proportion | 0.991 | |||
| 2/1 ratio | 0.991 | |||
| CTT 1 near-misses | 0.864 | |||
| CTT 2 near-misses | 0.710 | |||
| CTT 2 color sequence errors | 0.509 | |||
| CTT 1 number sequence errors | 0.698 | |||
| CTT 1 prompts | 0.525 | 0.617 | ||
| CTT 2 number sequence errors | -0.405 | |||
| Variance (%) explained by each factor | 26.23% | 21.91% | 13.45% | 11.67% |
| Cumulative explained variance % | 26.23% | 48.14% | 61.59% | 73.26% |
| Healthy controls | ||||
| CTT 1 time | 0.823 | |||
| CTT 2 time | 0.645 | 0.688 | ||
| CTT 1 prompts | 0.639 | |||
| CTT 2 prompts | 0.439 | |||
| 2-1 difference | 0.972 | |||
| (2-1)/1 proportion | 0.942 | |||
| 2/1 ratio | 0.942 | |||
| CTT 1 near-misses | 0.780 | |||
| CTT 2 near-misses | 0.744 | |||
| CTT 1 number sequence errors | 0.662 | |||
| CTT 2 number sequence errors | 0.833 | |||
| CTT 2 color sequence errors | 0.831 | |||
| Variance (%) explained by each factor | 16.15% | 27.24% | 15.00% | 13.31% |
| Cumulative explained variance % | 16.15% | 43.39% | 58.39% | 71.70% |